Sectional boiler



UNITED STATES PATENT -EETcE.

SECTIONAL BOILER.

SPECIFICATION forming part of Letters Patent No. 364,982, dated June 4, 1887,

(No model.)

To all whom it may concern.-

Be it known that I, HENRY WARDEN, of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Sectional Boilers, of which the following is a true and exact description, due reference being bad to the accompanying drawings, which form a part hereof.

My invention relates to that kind of steamgenerators known as sectional boilers, and has for its object to provide a steam-generator which will combine the advantages of the best types of such boilers now in use with improved f urnaceflue arrangements and devices for drying and superheating the steam generated in the water tubes and heaters. A further object of my invention is to so construct my boilers that they may be transported in comparatively small and light sections, and at the same time be readily put up. This I accomplish in the manner hereinafter described, and illustrated in the accompanying drawings, in which- Figure 1 is a side sectional view of my im proved boiler as erected and ready for use, and Fig. 2 is a front elevation of the boiler.

A is the ordinary masonry inclosing the boiler; c c c, water-tubes set at an incline and secured in headers O.

I I I are pipes connecting the front headers with the steam and water receptacle H.

J represents similar pipes connecting the back headers with the receptacle H. H, which here corresponds to the ordinary steam and water drum of the Babcock and IVilcoX boiler, which is the general trade-name for boilers of this class, is made up of the wellknown Harrison elements of cast-iron, said elements being cast of substantially spherical form and securely clamped together to form a generator boiler or receptacle consisting of a mass of hollow spheres connected by collars, ground joints, or short tubes.

N N are pipes leading from the upper end row of spherical elements to the steanrconduit D is the furnace grate; E, a deflectingwall extending upward from the back of the grate to or nearly to the top of the tubes 0; F, a deflecting wall or bridge extending down to or about the bottom of the tubes 0.

G is a wall or partition separating the furnace-fines which surround the lower parts of the boiler from the upper flue, L.

K is an opening in the partition G.

L is a flue or chamber surrounding the spherical Harrison elements H, and forming part of the flue system connecting the furnace with the stack M.

The water-tubes c and headers O of my improved boiler are, it will be observed, entirely situated in the furnace-fines, as are also the spherical elements which form the steam and water receptacle of my boiler.

The deflecting-walls E and F cause the pro ducts of combustion from the furnace D to cross the water-tubes c c three times, causing them also to come into close contact, and, indeed, to surround the headers especially those at the back of the boiler. The gases then escape through the opening K into the fiue L, where they pass over and among the spherical elements H, and finally escape into the stack M. By this arrangement I not only expose the inclined water-tubes or steam-generating part of my boiler to the greatest pos sible amount of heat, but by means of the great surface of the spherical elements exposed in the flue L the steam in the upper portion of the receptacle H is dried and superheated, and thus one of the great defects of this class of sectional boilers obviated.

The water-tubes c and headers O are, as is usual with this class of boilers, easily put to gether, and the headers being made in sections, this part of the structure is easily transported in packages of but small individual weight. In ordinary boilers of this class, however, the upper steam and water receptacle is large, cumbersome, and heavy, though I am aware that plans of making it in divisions which can be more easily handled have been repeatedly suggested. My plan of making this part of the boiler of spherical element-s makes it quite as easy to transport as are the lower portions, while at the same time it is easily put together and has advantages, as before noted, over any of the constructions heretofore used.

As shown in the drawings, the products of combustion are permitted to enter the space B B in front of the front headers, and I prefer to have them do so, as the whole of the sired.

generating part of the boiler is thus exposed to the heat of the furnace; but the front headers may be closed up to form a fire-wall, if de- The arrangement and number of the deflecting-walls and bridges may also be varied, that shown being, I believe, well adapted for use.

It may be desired to bring the front of the receptacle H out to the front of the inclosing' structure, so that horizontal rows of the elements may be readily accessible; but I prefer to entirely inclose the whole boiler, making the front plates, R and S, of the enveloping structure removable, so that the tubes and elements may be got at for examination, cleaning, and repairing.

I am aware that sectional boilers have been proposed and described in Hartleys patent of February 9, 1886, having an arrangement of fines similar to that of my boiler. In such proposed construction, however, the arrangement of the steam and water space with respect to the tubular boiler below it differs entirely from mine, and the circulation of the water and the conditions under which the steam separates frolnit are, in consequence,

- tion of the steam therefrom-and in addition,

where the receptacle is situated in a flue, as shown, I secure a more efficient utilizatlon of the heat of the furnace and obtain my steam more entirely free from water, or dry, than i any similar boilers in use. x Having now described my invention, what I claim as new, and desire to protect by Letters Patent, is-

l. The combination, with the tubes and headers of a sectional boiler, of a superimposed water and steam receptacle composed of intercommunicating spherical elements, substannicating spherical elements, substantially as and for the purpose specified.

4. The combination of the tubes 0, headers O, and steam and water receptacle H, composed of intercommunicating spherical elements, With the furnace D, deflecting-walls E,

F, and G, opening K, flue L, and stack M, 65

all substantially as and for the purpose specified.

, HENRY WARDEN. Witnesses:

II. W. HAN PowEL, FRANCIS T. CHAMBERS, LISLE SToKEs. 

